6OLIFUO.E. 



511 



etc. ; tliey run rapidly laterally and backwards, and live on mites 

 and small insects. 



Fam. Chernetidae. Chdifer cancroides L. Book-scorpion -with two eyes. 

 OMslum ischnosccles Herm., with four eyes. Chthonius trombidioidcs Latr. 

 (fig. 412). 



Order 8. SOLIFUG.E.* 



Spider-like animals ivith separated head and thorax, with elongated, 

 segmented abdomen ; sub-chelate chelicerce and pediform pedipalpi. 

 Respiration is effected by means of trachece. 



The Solifugai ap- 

 proach insects in the 

 segmentation of the 

 body. The cephalo-tho- 

 rax is divided into two 

 regions of which the an- 

 terior is comparable to 

 the insect head, the pos- 

 terior (composed of three 

 segments) to the insect 

 thorax. The long cylin- 

 drical abdominal region, 

 which is composed of 

 nine to ten segments, is 

 quite distinct (fig. 413). 

 The body is closely 

 covered with hairs. The 

 oral apparatus consists 

 of powerful chelicerae, 

 which end in a large 

 vertically placed chela, 

 the lower arm of which can be moved perpendicularly against 

 the upper. The pedipalpi serve as ambulatory legs, but are with- 

 out claws, which are found only on the three posterior pairs 

 of legs. The latter arise from the three free thoracic rings, and 

 bear peculiar cutaneous lamellae at their base. The anterior 

 pair of legs belongs to the head and may be considered as a 

 second pair of pedipalpi (maxillary palps). The Solifugce pos- 

 sess two large projecting simple eyes, and respire like insects by 



* L. Dufour, " Anatomic, physiologic et histoire naturelle des Galeodcs,"' 

 Comptcsrendus d I'acad. dcs sciences, XLVL.1858. Th. Hutton, " Observations 

 on the habits of a large species of Galeodes," Ann. and May. of Aat. Hist., 

 XII., 1813. 



FIG. 413. GaleoJtt arancohJes (regne animal). 



